Submission #298806

#	Time	Username	Problem	Language	Result	Execution time	Memory
298806		square1001	Split the Attractions (IOI19_split)	C++14	11 / 100	141 ms	15220 KiB

split

#include "split.h"
#include <vector>
#include <algorithm>
#include <functional>
using namespace std;
vector<int> find_split(int N, int A, int B, int C, vector<int> ea, vector<int> eb) {
	int M = ea.size();
	vector<vector<int> > G(N);
	for(int i = 0; i < M; ++i) {
		G[ea[i]].push_back(eb[i]);
		G[eb[i]].push_back(ea[i]);
	}
	if(A == 1) {
		// subtask 2 (11 points)
		vector<bool> vis(N, false);
		int cnt = 0;
		vector<int> ans(N, -1);
		function<void(int)> dfs = [&](int pos) {
			if(cnt < B) {
				++cnt;
				ans[pos] = 2;
			}
			vis[pos] = true;
			for(int i : G[pos]) {
				if(!vis[i]) {
					dfs(i);
				}
			}
		};
		dfs(0);
		*find(ans.begin(), ans.end(), -1) = 1;
		for(int i = 0; i < N; ++i) {
			if(ans[i] == -1) ans[i] = 3;
		}
		return ans;
	}
	return vector<int>();
}

• Subtask 1: 0 / 7
• Subtask 2: 11 / 11
• Subtask 3: 0 / 22
• Subtask 4: 0 / 24
• Subtask 5: 0 / 36